Yeah...not gonna happen.
No. 1 can't because the renders for the VN are from Honey Select 2. And unlike Daz3D where the assets you buy from the asset store and the stuff you make are yours to freely commercialize and make money of, Honey Select 2 doesn't because the assets and the built-in studio where devs make the renders are supposedly for private and non-commercial use only, and cannot be commercialized or sold. The way devs skirt through these rules though is that you don't technically sell a product on Patreon or Subscribestar or Itch.io, as they release the game for free and you're only paying for the privilege to try them out earlier than the public release as well as providing devs some moolah in order for them to continue working. But once you sell that on Steam? Yeah, that's a quick cease and desist you're looking at, bud.
No. 2 on the other hand...well,
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, but Cari won't be able to sell an album because most of the stuff used in the game are from Royalty-Free sites like Epidemic Sound. And while Cari is able to get music from said sites, recently they have been cracking down on devs that use their music for Adult VNs through the anti-porn clauses in their contracts, meaning you can use their music for stuff EXCEPT for adult-related content. So far though, Cari seems to be flying under the radar from getting a CnD from these license holders because he's currently not selling Eternum on Steam AND his work isn't as popular as, say, BaDIK or any other Daz3D AVN that's currently on Steam. And he'll likely want to keep it that way I think.